- ICH GCP
- Yhdysvaltain kliinisten tutkimusten rekisteri
- Kliininen tutkimus NCT00907153
Vitamin D for the Treatment of Women With Polycystic Ovary Syndrome (PCOS)
Vitamin D Supplementation in Polycystic Ovary Syndrome: a Randomized Controlled Trial.
Tutkimuksen yleiskatsaus
Tila
Interventio / Hoito
Yksityiskohtainen kuvaus
As many cells throughout the body possess the vitamin D receptor, adequate vitamin D levels may be essential for multiple physiologic functions. In recent years, vitamin D insufficiency has been linked to insulin resistance, inflammation, poor psychological health, obesity, type 2 diabetes, and cardiovascular disease - these are also commonly found in women with Polycystic Ovary syndrome (PCOS). We believe that vitamin D insufficiency contributes to insulin resistance, inflammation, and psychological distress in women with PCOS. These adverse effects may ultimately increase the risk for serious long-term complications in PCOS, including type 2 diabetes and cardiovascular disease. The key objectives of this research study are to determine the effects of vitamin D supplementation on insulin resistance, inflammation, mood and overall well-being in women with PCOS.
The protocol has been modified by adding the following specific aim: To compare vascular function in healthy age and BMI similar matched women to PCOS women pre-treatment. Our hypothesis is that PCOS women will have greater attenuations in retinal vascular reactivity compared to healthy control women, demonstrating poorer endothelial function. We are currently recruiting healthy women who are age and BMI similar to the PCOS women and measure their retinal vascular reactivity for comparisons to the PCOS women's pre-treatment vascular reactivity. These healthy women will only have a baseline visit in which retinal vascular reactivity will be measured. They will not be enrolled in the placebo or Vitamin D randomization process as described above.
Opintotyyppi
Ilmoittautuminen (Todellinen)
Vaihe
- Vaihe 2
- Vaihe 1
Yhteystiedot ja paikat
Opiskelupaikat
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-
Pennsylvania
-
Hershey, Pennsylvania, Yhdysvallat, 17033
- Penn State College of Medicine, Penn State Milton S Hershey Medical Center
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Osallistumiskriteerit
Kelpoisuusvaatimukset
Opintokelpoiset iät
Hyväksyy terveitä vapaaehtoisia
Sukupuolet, jotka voivat opiskella
Kuvaus
Inclusion Criteria:
Diagnosis of PCOS based on:
- Eight or fewer menstrual periods per year or spontaneous intermenstrual periods of greater than or equal to 45 days, and
- Elevated testosterone levels
Exclusion Criteria:
- Current Pregnancy or Nursing
- Elevated calcium
- Kidney Stones or kidney disease
- Current use of vitamin D (other than a multivitamin)
- Use of metformin or other insulin sensitizing drugs in the last 3 months
- Elevated prolactin or untreated thyroid disease
- Diabetes, Liver disease, Heart disease, or other serious medical condition
Opintosuunnitelma
Miten tutkimus on suunniteltu?
Suunnittelun yksityiskohdat
- Ensisijainen käyttötarkoitus: Hoito
- Jako: Satunnaistettu
- Inventiomalli: Rinnakkaistehtävä
- Naamiointi: Kaksinkertainen
Aseet ja interventiot
Osallistujaryhmä / Arm |
Interventio / Hoito |
|---|---|
|
Placebo Comparator: Plasebo
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Placebo by mouth once daily for 12 weeks
|
|
Kokeellinen: D-vitamiini
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Vitamin D 300 mcg by mouth once daily for 12 weeks
|
Mitä tutkimuksessa mitataan?
Ensisijaiset tulostoimenpiteet
Tulosmittaus |
Toimenpiteen kuvaus |
Aikaikkuna |
|---|---|---|
|
Change From Baseline in Mean Quantitative Insulin Sensitivity Check Index (QUICKI)
Aikaikkuna: Baseline and 12 weeks
|
Quantitative insulin sensitivity check index (QUICKI) is a validated measure of insulin sensitivity based on fasting insulin and glucose.
Quantitative insulin sensitivity check index (QUICKI) = 1/[log(I(0)) + log(G(0))]).
|
Baseline and 12 weeks
|
Toissijaiset tulostoimenpiteet
Tulosmittaus |
Toimenpiteen kuvaus |
Aikaikkuna |
|---|---|---|
|
Change From Baseline in Mean High Sensitive C-reactive Protein (hsCRP)
Aikaikkuna: Baseline and 12 weeks
|
High sensitive C-reactive protein (hsCRP) was assessed as a measure of inflammation.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Systolic Blood Pressure
Aikaikkuna: Baseline and 12 weeks
|
Blood pressure was measured in the right arm in the sitting position after a 15-minute rest.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Diastolic Blood Pressure
Aikaikkuna: Baseline and 12 weeks
|
Blood pressure was measured in the right arm in the sitting position after a 15-minute rest.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Fasting Glucose
Aikaikkuna: Baseline and 12 weeks
|
Glucose was assessed after 12 hours of fasting.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Fasting Insulin
Aikaikkuna: Baseline and 12 weeks
|
Insulin was assessed after 12 hours of fasting.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean 2-hour Glucose
Aikaikkuna: Baseline and 12 weeks
|
Participants underwent a 75-gram oral glucose tolerance test, in which blood samples for glucose and insulin were obtained at 0 and 2 hours and used to calculate the insulin sensitivity index (ISI 0,120).
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean 2-hour Insulin
Aikaikkuna: Baseline and 12 weeks
|
Participants underwent a 75-gram oral glucose tolerance test, in which blood samples for glucose and insulin were obtained at 0 and 2 hours and used to calculate the insulin sensitivity index (ISI 0,120).
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Insulin Sensitivity Index (ISI 0,120)
Aikaikkuna: Baseline and 12 weeks
|
Participants underwent a 75-g oral glucose tolerance test, in which blood samples for glucose and insulin were obtained at 0 and 120 minutes and used to calculate the insulin sensitivity index (ISI0,120).
The ISI 0,120 = the glucose uptake rate divided by the mean plasma glucose divided by the log(mean serum insulin).
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Homeostatic Model Assessment of Insulin Resistance (HOMA-IR)
Aikaikkuna: Baseline and 12 weeks
|
Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) is a validated measure of insulin resistance based on fasting insulin and glucose.
HOMA-IR is calculated as the product of fasting glucose and insulin divided by 22.5.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Total Cholesterol
Aikaikkuna: Baseline and 12 weeks
|
Lipid profile was assessed after 12 hours of fasting.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean HDL Cholesterol
Aikaikkuna: Baseline and 12 weeks
|
Lipid profile was assessed after 12 hours of fasting.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean LDL Cholesterol
Aikaikkuna: Baseline and 12 weeks
|
Lipid profile was assessed after 12 hours of fasting.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Triglycerides
Aikaikkuna: Baseline and 12 weeks
|
Lipid profile was assessed after 12 hours of fasting.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Total Testosterone
Aikaikkuna: Baseline and 12 weeks
|
Total and free testosterone levels were assessed from blood samples to evaluate effects on hyperandrogenemia in PCOS.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Free Testosterone
Aikaikkuna: Baseline and 12 weeks
|
Total and free testosterone levels were assessed from blood samples to evaluate effects on hyperandrogenemia in PCOS.
|
Baseline and 12 weeks
|
Muut tulostoimenpiteet
Tulosmittaus |
Toimenpiteen kuvaus |
Aikaikkuna |
|---|---|---|
|
Change From Baseline in Mean 25-hydroxyvitamin D
Aikaikkuna: Baseline and 12 weeks
|
Total 25-hydroxyvitamin D was assayed by the Immunodiagnostic Systems radioimmunoassay.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Vitamin D Binding Protein
Aikaikkuna: Baseline and 12 weeks
|
Vitamin D binding protein levels were assessed as it has been linked with insulin resistance and type 2 diabetes.
|
Baseline and 12 weeks
|
|
Change From Baseline in Mean Intact Parathyroid Hormone (i-PTH)
Aikaikkuna: Baseline and 12 weeks
|
Intact parathyroid hormone levels were assessed as they have been linked with obesity and insulin resistance.
|
Baseline and 12 weeks
|
Yhteistyökumppanit ja tutkijat
Sponsori
Tutkijat
- Päätutkija: Nazia Raja-Khan, M.D., Penn State College of Medicine, Penn State Milton S. Hershey Medical Center
Julkaisuja ja hyödyllisiä linkkejä
Opintojen ennätyspäivät
Opi tärkeimmät päivämäärät
Opiskelun aloitus
Ensisijainen valmistuminen (Todellinen)
Opintojen valmistuminen (Todellinen)
Opintoihin ilmoittautumispäivät
Ensimmäinen lähetetty
Ensimmäinen toimitettu, joka täytti QC-kriteerit
Ensimmäinen Lähetetty (Arvio)
Tutkimustietojen päivitykset
Viimeisin päivitys julkaistu (Todellinen)
Viimeisin lähetetty päivitys, joka täytti QC-kriteerit
Viimeksi vahvistettu
Lisää tietoa
Tähän tutkimukseen liittyvät termit
Muita asiaankuuluvia MeSH-ehtoja
- Patologiset prosessit
- Neoplasmat
- Endokriinisen järjestelmän sairaudet
- Sairaus
- Munasarjakystat
- Kystat
- Munasarjan sairaudet
- Adnexaaliset sairaudet
- Sukurauhasten häiriöt
- Munasarjojen monirakkulaoireyhtymä
- Oireyhtymä
- Huumeiden fysiologiset vaikutukset
- Mikroravinteet
- Vitamiinit
- Luutiheyden säilyttämisaineet
- D-vitamiini
Muut tutkimustunnusnumerot
- 29714
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